A stack-based buffer overflow exists in the ONCONFIG environment variable read process when it is bigger than 495 bytes and read in by the IBM Informix IDSv9.40 ontape binary.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32581/open3sIDSontape.txt
Source: https://packetstormsecurity.com/files/32581/open3sIDSontape.txt.html